Which of the following RAID levels provides the HIGHEST fault tolerance possible?

RAID 10, which combines disk mirroring (RAID 1) and disk striping (RAID 0), provides the highest fault tolerance possible among the given options. In a RAID 10 configuration, data is mirrored across pairs of disks, which means that if one disk in a mirrored pair fails, the system can continue to operate using the remaining disk. Additionally, data is striped across multiple mirrored pairs, which improves read and write performance.

The fault tolerance of RAID 10 comes from its ability to sustain multiple disk failures as long as no mirrored pair loses both disks. For instance, if two disks fail but they are from different mirrored pairs, the data remains accessible. This redundancy ensures high data availability and resilience against disk failures.

In contrast, while RAID 6 also offers strong fault tolerance by using double parity to protect against up to two disk failures, it does not offer the same level of performance benefits as RAID 10. RAID 5 allows for one disk failure but does not offer as much redundancy as RAID 10 or RAID 6. RAID 0, while providing excellent performance due to striping, does not offer any redundancy; if one disk fails, all data is lost.

Therefore, RAID 10 stands out